Conveyance lamp



Feb. 2, 1932. E, G RY 1,843,154

CONVEYANCE LAMP Filed Oct. 25, 1929 l atented Feb. 2, 1932 entra n STATES PATENT OFFICE EMMAIIUEL J. GREGORY, OF TOLEDO, OHIO, ASSIGNOR TO THE COMMONWEALTH MANU- FACTUBJING' COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO CONVEYANCE LAMP Application filed October 25, 192-9. Serial 110. 402,493.

My invention has for its object to provide a lamp, particularly adapted for use in connection with conveyancesoi different forms. Lamps embodyingmy invention have means for confining the rays of light, projected by the lamp, beneath the level of the top of the lamp and, consequently, prevents the blinding that is produced by reflectors commonly used in lamps. By confining the rays of light to a point below a horizontal plane through the lamp, an approaching conveyance, such as an approaching automobile, may be lighted and the rays of light will not rise to the eyes of the operator of the conveyance. The invention particularly provides a reflector ridge that intercepts all rays of light that strikes the outer portions of the parabolic reflector, that are reflected up wards above the horizontal plane, that eX- tends through the top of the lamp, and causes the blinding of the eyes of the operator of an approaching automobile or other conveyance.

he invention may he used in connection with double lighted bulbs and the lamps may be formed to reflect the rays from each or" the bulbs and direct them in parallel relation towards the road; or each lamp may be lighted by a single bulb, wherein the rays of right to the lower side of the reflector are intercepted, and directed to the upper side of the reflector to prevent the rays of light from being directed above the level of the top of the lamp.

The invention may be contained in structures of diflerent forms and, to illustrate a practical application of the invention, I have selected a lamp embodying the invention as an example of the various structures that contain my invention, and shall describe the lamp selected hereinafter. The lamp referred to is shown in the accompanying drawings.

Fig. 1 illustrates a vertical section through the lamp selected for purposes of illustration. Fig. 2 illustrates a transverse section of the lamp taken on the plane of the line 22 indicated in Fig. 1. Fig. 3 is a front view of q the forward part of the reflector of the lamp,

the part located in advance of the section line 2-2 indicated in Fig. 1.

The lamp is provided with'the usual shell 1 that is suitably supported on the pedestal 2, or part or" a bracket. The bracket may be connected in any suitable manner to a part of the conveyance. The shell 1 is preferably ovoid in form, when the lamp is to be lighted by a single electric bulb; and when it is to be lighted by two bulbs, it preferably has an oblong cross-section, as shown in Fig. 2. The shell 1 forms a protective shell for the reflector and the light bulbs.

The reflector is located within the shell 1 and conforms generally to the shape of the shell 1. It is formed of two parts 4 and 5. The part 4: is formed of three portions, each of which has a configuration characteristic to itself. The portions merge into each other bycurved surfaces to form a substantially continuous inner reflector surface. Thus, the portion 6 is parabolic in form and oins with the portion 7 that extends spoon-shaped across the lower half of the parabolic portion 6, substantially to the horizontal plane of the axis of the lamp. The portion 8 of the part 4t of the lamp is substantially ovoid in form and joins gradually by curved surfaces with the portions 6 and 7 of the part 4.

The part 5 0]": the lamp has the portions 9, 10, and 11, which are joined togetherby curved surfaces to form a continuous inner surface without any sharp corners. The portions 9 and 10 form the continuation of the portions 6 and 8, when the parts 4 and 5 are secured together, The portion 9 conforms to a .truncated paraboloid, its larger diameter being located contiguous to the edge of the portion 6. The portion 11 is substantially spoon-shaped in its configuration, corresponding to the portion 7 of the part 4, and these portions form an intercepting ridge 19. The parts of the reflector 3 are formed of sheet metal and are supported within the shell 1 by means of a rib 15 that may be formed of outwardly turned flanges 16 extending from theedges of the parts 4: and 5, the flange 16 of the outer edge of the part 4 being located in juxtaposed relation to he flange 16 that extends from the inner edge ribbed surfaces formed in theuinner edgeof a rim member 20, which may be secured in a spun groove'21, formed near the edgeof the shell 1, by an inturnedflangeQZ, The rim member 20 is formed to retain a ring'28, a flange 24, formedon the edge ofthe reflector 3, a ring 25,'and the .-lens .26. The flange 24 is clamped between ;the rings 25 and 2-3, in theinanner. well known in the art.

The bulb is of the type well known in the art, it being provided with a socket 31 that is adjustably supported in a bracket 32. The bracket 32' is supported on a .ring .33 whichconformsto, and is secured to, the small end of the reflectorflby means of the flange 34 that maybe spunover the inneredge of the ring'33. ,Asecond ring 35 is secured by 7 means of the screws-36 to-thering 33. The

7 part 40 is provided with threads, and alnut ,45 isthreaded onto .the cylinder part and so as to engagethe endso-f the cross bar 43. The spring 44operates to press the ends of the cross bar against the nut 45 and thus the bulb 30. may be, readily adjusted with respect to the reflector; V

Inthe operation ofthe lamp, the light will strike the parabolic partsv6 and 9 of the reflector and will berprojected parallel to. the taxis ofthe lamp, thelamp being loc-atedthe properdistance from the rearend ofthereflector. It will. also striketheportions 8 that 'form the sides of the lamp, and ,willbe reflectedforwardly. The rays will also strike the lower portions of the parabolic reflector part 6,,butsuch rays will be intercepted and reflected ,by the spoon shaped portion ,7 and returned to-the parabolic reflector .6, which will operate to direct the rays toward the road at a greater or less distance from the downward. Thus, the invention affords a non-glare lamp particularly adapted for use on automobiles.

I claim: 7

In a conveyance lamp, a shell, a reflector located inthe shell, the upper half oithe reflector formedof-two portions, the upper half of the inner portion conforming to a para- "bolic surface, the upper half of the outer portion conforming to, a truncated .paraboloid,

the; diameter of -tl esaid outer ,portion being larger at the edge of the first named portion,

thlo-wer half of the reflector having reentrant part formed of concave surfaces terminating in a ridge, flange portions extending from the ridgelof theshell for locatingand suppo ting th dg i i he she subs anti l y midwaybe wee th innere d f the efiecto an th mit endan 'thepla e of heax of theparabolicportionsthat form the upper half ofthe reflectonandan electric bulbjlocat-e'dmear the smaller end of thereflector.

1n witness whereof I have z-hereuntosigned my nam o this spe i cat EMMANUEL J. GREGORY- frontof thelamp. Some of the rays will be f reflected from the portion 9 of the part '5 t h pa t :lly hic she sui t rt cause all ofvs uch rays to be directed below the axis ,of t-hedamp. The portion 9 :will angu arly directall ,diflused rays diagonally 

